Roasting and volatilizing furnace.



PATENTED AUG. '28, 1906.

s. L. GLAVWSON. V ROASTING AND VOLATILIZING FURNACE.

APPLIUATION FILED SEPT. 9,1906.

4 SHEETfl-SHEET 2.

PATENTED AUG. 28, 1906.

S 3 4 W 9 2 8 0 N ROASTING AND VOLATILIZING FURNACE.

APPLICATION FILED SEPT-9.19 05.

4 SHEETS-SHEET 3 0a 62 %1 i WaW-ZZ? No 829,843. PATENTED AUG. 28, 190 6.

-s'. I. GLAWSON. ROASTING AND VOLATILIZING FURNACE.

APPLIUATION FILED SEPT. 9. 1906.

4 SHEETS-SHEET 4.

.5 tion-onthe line a; :12, Fig. 1.

. tlon on the line y 2 Fig. 1. Fig. 4 is a section UNITED STATES PATENT OFFICE.

SELDEN 1. CLAWSON, or sAL'r LAKE-CITY, UTAH. ROASTING A ND VOLATILIZING FURNACE-- Specification of Letters Patent. 7

Patented Aug. 28, 1906.

Application filed September 9,1905. Serial to. 277.672.

To all whom it may concern;

Be it known that I, SELDEN 1. GLAWSON,'2L citizen of the United States, residing at Salt Lake City, in the county of Salt Lake and State of Utah, have invented certain new and useful Improvements in Roasting and Volatilizing Furnaces, of which the following is a specification.

This invention relates to ore-roasting fur- IO 'naces, and pertains especially to the class of volatilizing-furnaces having rotary cylinders. The object of-the invention is to provide an ore roastingor volatilizing furnace having'a continuous feed and discharge without waste r 5 of heat and arranged to have a current of air pass over or above the ore independent of the 111'8-b'0 gases and 'carry olf the volatilized metals or compounds as they rise from the ore.

2o 7A further object of the inventionis to provide an ore-roasting furnace to volatilize the ore and expel metal values therefrom and arranged-to have a continuous current of air for carrying off said values; to provide means for 2 5 preventing heat radiationand Waste and for reusing such heat; to provide means for operating the furnace with owdered coal, and to blast. 3

, furnish means for supp ying hot air to a fan-;

39 The object still further of the invention is to provide an arrangement of pi es in con nection with the furnace where y the aircurrents to the furnace, the ore, and the fuelare all'heated by the furnace before entering 3 5 the latter.

With these and various other objects, advantages, and improved results in view the invention consists in the novel construction and peculiar arrangement of parts, as Willbe 4o heremafter more fully disclosed.

In the accompanyin drawings, forming part of this application, Eigure 1 is a longitudinal sectionof a furnace constructed in accordance with my invention. Fig. 2 is a sec- Fig. 3 is a secon the line .2 2, Fig. 1. Fig. 5 1s an elevation of the'u'pper' endof the furnace; Fig. 6 is a p 1 similar view of the lower end. Fig. 7 is a detail top view 'of coal-feed fan and fan-pipes,

showing" lower. end of, the furnace in transverse section. Fig. .8'isa detail section of part of the pipe having'safety-valves. Fig. .9 is a'transverse longitudinal section of the chimney-flue, partly broken away.

.Thesame reference numerals denote the I same parts throughout the "several views of t e drawings.

The shell or cylinder 1 is composed of suit-j able fire-brick and has a-central cylindrical muflle or ore-heating chamber 2, the wall of which extends throughout-the length of the volatilizing-cylinder l and through a fire-box 3, with a series of fire-box chambers 4 between the said two cylinders, whereby the mufile may have full benefit of heatfrom the firebox to the'entire exclusion of products of combustion. The fire-box is rovided with pipecoils 5, having a pipe -6 eading therefrom into the discharge end H of the mufile 2,. and the upper end of the volatilizer is pro-'- vided with a circular pipe 8 and an electricmotor fan 9. Longitudinal pipes 10 connect.

the pipe 8 with a circular pipe 8, and the lat- .ter 1s connected with the coils 5, so that the, air to the muffle is heated in its passage from* The lower end of they 18, extending through the longitudinal branch '19 of the chimney 20. The pipe 17 terminates in the casing-of the fan 15 and is provided, preferably near the fan 15, with safety-valves 21, having stems 22 of such metal as will fuse when the air in the pipe'17 reaches a higher temperature than may be desired. p

The chimney branch 19'has. a suitable orehopper 23 and incloses an ore-feed screw 24,

located above the nest of ipes 18. A chute 25' carries the .ore from t e screw 24; into a hopper 26, whence it is carried across a fumepipe 27 by a screw conveyer 28 into the upper end of the muffle. "In this mannerthe ore is under heat from the'tiine it enters the screw 24 untilit reaches the muffle.

The cylinder 1 inclines from its upper to lower ends and is provided with pipes 29, "to which are secured rails 30, adapted to rest on the wheels 31 ofa truck 32, and said wheels. are revolved by suitablefpower connected to a gear 33, so as to revolve the cylinder.

.The operationis as follows: During the revolution of the cylinder crushed ore mixed with salt is fed by the screw 24 by way of the chute and ore-conveyer into one end of the muffle, while the powdered coal is fed to the fire-box and fire-chambers at the other end, and the air to the muffle is entered at the opposite end. The coal-blast and muffle aircurrents-are superheated by heat from the furnace after the latter is under way, and by reason of the ore passing through the chimney branch, over the pipe-nest, and through the fume pipe all moistureis removed and the ore superheated. The ore drifts down-' wardly from the upper to the lower end of the muffle, where the roasted ore is discharged durin the revolution of the cylinder and the volati e metals are carried out of the upper end of the muffle into, the fume-pipe. I

Having thus described my invention, what I claim as'new, and desire to secure by Letters Patent, is

1. In an ore-roasting furnace, the combination, with a revoluble cylinder having a fire-box, a central muffle extending through the cylinder and fire-box, a series of fire-box chambers surrounding the muffle, and means for feeding ore to the muffle, of the ore and coal heating'pipes, a series of pipes carriedby the cylinder for inducting hot air into the muffle, and a series of pipes. coupled to the coal-pipe for inducting coal into the fire-box.

2. In anore roasting and volatilizing furnace, the combination, with a revolubl'e cylinder, an ore-muffle extending from one end to the other of the cylinder, a fire-box encircling the ore-discharge end of the muffle, and

a fumeipe coupled to the ore-intake end of the mu e, ofthe fire-box pipe-coils having a pipe to convey hot air into the ore-discharge end of the muffle, and a series of air-circulat ing pi es connected together at one end of the cy inder and joined to the said'pipe-coil.

3. In a volatilizing-furnace, the combination, with a revoluble cylinder having a series of longitudinal air-pipes in its wall, and airpipes surrounding the fire-box end of the cylinder and connected to said, longitudinal pipes, of a cylindrical muffle extending from end to end of the cylinder and having an oreintake at one end and an ore-discharge at the other end, fire-chambers between the muflie 'and the cylinder, and a pipe leading from said coil into said discharge end of the muffle.

4. In a volatilizing-furnace, the combina-' tion, with the revoluble cylinder having a se-. ries of fire-chambers and a central muffle separate from the chambers, of a fume-pipe coupled to one end of the mufiie, an ore-conveyer extending across the fumepipe into the muffle, and the fuel-feed pipes carried by the cylinder atthe other end of the muffle in communication with the said chambers.

5. In a volatilizing-furnace, the combination, with an inclined revoluble cylinder, a

6 5 fire-box carried by the lower end of the cylinder, a central ore-muffle separated from the cylinder by a series of,fire-chambers,.airpipe coils around the fire-box, a series of superheating air-pipes extending lengthwise the cylinder and connected with said coils, and means for feeding powdered coal .to the fire-box, of a fume-pipe receiving from one end of the muffle, and a blastepipe extending from'said coils into the other end of the muffle.

6. The combination, with an ore roasting and volatilizing furnace having a central muffle, and means for revolving it, of afixed' which extends the length of the furnace, an

ore-feed in said branch, an ore-chute connecting saidconveyer and said feed, a nest of superheating-pi es'in said branch, a fuel-pipe connected wit said pipe-nest, and a series of fuel-pipes carried by the furnace and coupled to saidfuel-pipe.

8. The combination, with an ore roastin and 'volatilizing. furnace having a centra muffle, and means for revolvin it, of a fixed fume-pipe in which one end of t e furnace revolves, an ore-conveyer extending crosswise through the fume-pipe into the muffle, a stationary smoke-stack or chimney a branch of which extends the length of the furnace, an ore-feed in said branch, anore-chute connecting said conveyer and said feed, a nest of superheating-pi es in said branch, afuel-pipe connected wit said pipenest, a series of fuelpipes carried by the furnace and coupled to said fuel-pipe, a coal-conveyer extending into the fuel-pipe, and a fan interposed in the fuel-pipe between said pipe-nest and the coal-conveyer. V

9.1Th6combination, with an" ore roastin and qvolatilizing furnace having a centra muffle, and means for revolving it, of a fixed fume-pipe around which one end of the fur nace revolves, an ore-conveyer extending crosswise through the fume-pipe into the mufiie, a stationary smoke-stack or chimney a branch of which extends the length of the furnace an ore-feed in said branch, an orechute connecting said conveyer and said feed, a nest of superheating pipes in said branch, a fuel-pipe connected with said 1pipe-nest, a series of fuel-pi es carried by t e furnace and cou led to said fuel-pipe, a-coal-conveyer exten ing into the fuel-pipe, a'fan interposed in the fuel-pipe between said pi e-nest and the coal-conveyer, and safetywa ves in the fuelpipe between the pipe-nest and the fan.

10. The combination, with an ore roasting and volatilizing furnace having a revoluble cylinder, 8. muflie separated from the cylin+ der by-chambers, a fixed chimney, a chimney branch extending the length of the cylinder, a fire-box from which the chambers extend, a screw feed in said branch and having an orehopper above the fire-box and discharging under the chimney, a fume-pipe at the orereeeiving end of the muflie, an ore-oonveyer receiving from said feed-screw and extending through the fumeipe into the mufl'le, a nest of air-pipes in sai branch and connected to the coal-feed, pipe-coils surrounding the firebox and leading into the mufiie, and a series of air-circulating pipes extending lengthwise the cylinder and coupled to the pipecoils.

In witness whereof I hereunto set my hand in the presence of Witnesses.

SELDEN' I. CLAWSON. Witnesses WM. T. FOULGER,

JOHN P. CAiiow, G. SPENCER CHAMBERS. 

